Loss of Nerve Function

Facial nerves stimulate the tear glands in dogs. Because these nerves pass through the middle ear, long-standing ear infections can damage the nerves, and lead to very little tears being secreted. The same problem can result from nerve damage that occurs for other reasons such as injuries to the face and head.

Damage to Ducts

Chronic conjunctivitis, especially, can lead to scarring of your pet’s eye lids. As a result, ducts that carry tears from the glands to the eye can become plugged. This means that tears will not reach the eye.

Less Common Causes

Several other rare conditions can lead to dry eyes.

In some cases, dogs may be born without tear glands

Some sulfa-containing drugs can cause temporary or permanent KCS

If the third eyelid is removed due to cherry eye, the eye may not be able to secrete adequate tears

A hormone imbalance related to hypothyroidism may cause KCS

Anesthesia administered during a surgical procedure can cause temporary dry eyes (veterinarians should lubricate your dog’s eyes before any procedure to avoid the problem)

Injuries to the eyes can also cause damage that leads to dry eye

Identifying the cause of chronic dry eye is the first step in treatment. Make sure you pay attention to the signs and symptoms, and if you see something, talk to your vet. Otherwise your dog could be left with a very itchy problem.

This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian with respect to your pet. It has, however, been verified by a licensed veterinarian for accuracy.